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Re: 1st time on DCG Project
Posted: Mon Apr 09, 2018 11:05 pm
by pluto
Zeta wrote:Came back with nothing.
This is my setup diagram.
7301002C-9351-452E-B678-8E596F4E3270.jpeg
Today subjects
15AC2D4D-318C-43A9-BBA3-82D1A6B8274A.jpeg
What I got
30mindark 1minfixer 5minwater 1min59% 1min84% 3min99% dry hotgun
E9F7A673-66AF-451D-AF3F-394B6DD27DE7.jpeg
Is this call burn in effect?
https://youtu.be/kaZUhbqYrts
There may be movement during your exposure. Simplify your developing process so you can figure out how your process is affecting the result. Fix your hologram by exposing it to a 100 watt lightbulb for 30 seconds instead of a fixer. Wash in water for upto 5 minutes, then 70% IPA, then 99% IPA.
Touch your plate to the subject of the hologram, so if there is movement, then everything will move together.
Don't try to have your plate "hover" above your subject. Try simply placing your plate (emulsion side down) on a pile of screws. Let it settle for 5-10 minutes, then turn on the laser (preferably remotely). Aim for a 5x5cm hologram to start, which should need only 2-4 minute exposure time, depending on how much light is being lost.
Try to strike the plate at brewser's angle (56 degrees) to minimise reflection. You can find this angle experimentally by observing the amount of light being reflected onto a wall.
Re: 1st time on DCG Project
Posted: Tue Apr 10, 2018 1:37 pm
by Zeta
Finally
The best one (at this moment)
Thank you pluto and everyone.
- 278FF892-7053-4FFC-98A8-11574780ACFA.jpeg (227.07 KiB) Viewed 46804 times
https://youtu.be/x8As5vZkGeU
So the left side 1min is call Narrow band and right side 5min is call Broadband right? Or I just overexposed it.
Is it better to get closer to 90degree or 56degree is the best?
If I do a bigger plate do I have to change a develope time in each bath?
Re: 1st time on DCG Project
Posted: Tue Apr 10, 2018 6:46 pm
by pluto
Zeta wrote:Finally
The best one (at this moment)
Thank you pluto and everyone.
278FF892-7053-4FFC-98A8-11574780ACFA.jpeg
https://youtu.be/x8As5vZkGeU
So the left side 1min is call Narrow band and right side 5min is call Broadband right? Or I just overexposed it.
Is it better to get closer to 90degree or 56degree is the best?
If I do a bigger plate do I have to change a develope time in each bath?
Nice! Yes, 56 degrees is about right for glass.
I would try screws next, as this will test whether you can get some depth. The coin holograms are very shallow, almost appearing as photographs.
Bigger plates will need more time in both water and IPA, as you need to wash out more dichromate and dehydrate more surface area.
Just keep at, don't change too many variables at once and keep good notes.
I post every hologram I make, whether good or bad onto YouTube with some info in the title describing the parameters of the exposure.
Keep at it!
Re: 1st time on DCG Project
Posted: Tue Apr 10, 2018 8:41 pm
by Steven
Zeta wrote:Is it better to get closer to 90degree or 56degree is the best?
The easiest way to get the correct angle for minimum reflection, is to place an uncoated piece of glass, a slide in your case on
your setup and adjust the angle of your laser beam to give you minimum reflection of the beam on your ceiling.
I have a very similar setup and that is what I do. I don't measure angles.
Re: 1st time on DCG Project
Posted: Fri Apr 13, 2018 1:32 pm
by Zeta
Hello
Update test for depth
https://youtu.be/ucwrjBUwATA
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I have another one but it is not very good in depth.
Just an inch away from the upper part, too blur to see anything.
Is there any way to increase the depth? Or I miss some things?
Re: 1st time on DCG Project
Posted: Sat Apr 14, 2018 1:40 pm
by Zeta
Another depth test
https://youtu.be/zx4jb_JuZ6g
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Re: 1st time on DCG Project
Posted: Sat Apr 21, 2018 4:17 am
by Zeta
Hello
My plate looks dimmer and not clear.
Is this because old emulsion, my develop is bad or under/over exposed ?
- Coat yesterday
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- Coat last week
- DBAE41D3-BC55-47CD-A8AA-FE0AF5DB00B6.jpeg (90.76 KiB) Viewed 46626 times
How can I get rid of that fringe line while using mirrors?